<template>
  <view class="goods-detail-box">
    <!-- 轮播图区域 -->
    <swiper
      :indicator-dots="true"
      :autoplay="true"
      :interval="3000"
      :duration="1000"
      :circular="true"
    >
      <swiper-item v-for="(item, i) in goods_info.pics" :key="i">
        <image :src="item.pics_big" @click="previewImg(i)"></image>
      </swiper-item>
    </swiper>
    <!-- 商品信息区域 -->
    <view class="goods-info-box" v-if="goods_info.goods_name">
      <!-- 商品价格 -->
      <view class="price">￥{{ goods_info.goods_price }}</view>
      <!-- 信息主体区域 -->
      <view class="goods-info-body">
        <!-- 商品名称 -->
        <view class="goods-name">{{ goods_info.goods_name }}</view>
        <!-- 收藏 -->
        <view class="favi">
          <uni-icons type="star" size="18" color="gray"></uni-icons>
          <text>收藏</text>
        </view>
      </view>
      <!-- 运费 -->
      <view class="yf">快递：免运费</view>
    </view>
    <rich-text :nodes="goods_info.goods_introduce"></rich-text>
    <view class="goods-nav">
      <uni-goods-nav
        :fill="true"
        :options="options"
        :buttonGroup="buttonGroup"
        @click="onClick1"
        @buttonClick="buttonClick1"
      />
    </view>
  </view>
</template>

<script>
// 从vuex中 导入mapState方法
import { mapState, mapMutations, mapGetters } from 'vuex';
export default {
  watch: {
    total: {
      handler(newTotal) {
        const findResult = this.options.find(item => item.text === '购物车');
        if (findResult) {
          findResult.info = newTotal;
        }
      },
      immediate: true
    }
  },
  // watch: {
  //   // 页面首次加载完毕后，不会调用这个侦听器
  //   total(newVal) {
  //     const findResult = this.options.find(x => x.text === '购物车');
  //     if (findResult) {
  //       findResult.info = newVal;
  //     }
  //   }
  // },
  computed: {
    // 将m_cart模块下的count这个数据映射到当前页面中
    ...mapState('m_cart', ['cart']),
    ...mapGetters('m_cart', ['total'])
  },
  data() {
    return {
      // 商品详情对象
      goods_info: {},
      options: [
        {
          icon: 'shop',
          text: '店铺'
        },
        {
          icon: 'cart',
          text: '购物车',
          info: 8
        }
      ],
      buttonGroup: [
        {
          text: '加入购物车',
          backgroundColor: '#ff0000',
          color: '#fff'
        },
        {
          text: '立即购买',
          backgroundColor: '#ffa200',
          color: '#fff'
        }
      ]
    };
  },
  onLoad(options) {
    // 获取商品 Id
    const goods_id = options.goods_id;
    // 调用请求商品详情数据的方法
    this.getGoodsDetail(goods_id);
  },
  methods: {
    ...mapMutations('m_cart', ['addCart']),
    onClick1(e) {
      // console.log(e);
      if (e.content.text === '购物车') {
        // 跳转购物车页面
        uni.switchTab({
          url: '/pages/cart/cart'
        });
      }
    },
    buttonClick1(e) {
      if (e.content.text === '加入购物车') {
        const {
          goods_id,
          goods_name,
          goods_price,
          goods_small_logo
        } = this.goods_info;
        // 加购物车的时候，包装一个商品的信息对象
        const goods = {
          goods_id: goods_id,
          goods_name: goods_name,
          goods_price: goods_price,
          goods_count: 1,
          goods_small_logo: goods_small_logo,
          goods_state: true
        };
        // 把这对象 ，存到vuex中的cart数组中去
        this.addCart(goods);
      }
    },
    previewImg(i) {
      // 图片预览效果
      uni.previewImage({
        current: i,
        urls: this.goods_info.pics.map(item => item.pics_big)
      });
    },
    // 定义请求商品详情数据的方法
    async getGoodsDetail(goods_id) {
      const { data: res } = await uni.$http.get('/api/public/v1/goods/detail', {
        goods_id
      });
      if (res.meta.status !== 200) return uni.$showMsg();
      // res.message.goods_introduce = res.message.goods_introduce.replace(
      //   /<img /g,
      //   '<img style="display: block;" '
      // );
      res.message.goods_introduce = res.message.goods_introduce
        .replace(/<img /g, '<img style="vertical-align: bottom;" ')
        .replace(/webp/g, 'jpg');
      // 为 data 中的数据赋值
      this.goods_info = res.message;
    }
  }
};
</script>

<style lang="scss">
swiper {
  height: 750rpx;

  image {
    width: 100%;
    height: 100%;
  }
}
// 商品信息区域的样式
.goods-info-box {
  padding: 10px;
  padding-right: 0;

  .price {
    color: #c00000;
    font-size: 18px;
    margin: 10px 0;
  }

  .goods-info-body {
    display: flex;
    justify-content: space-between;

    .goods-name {
      font-size: 13px;
      padding-right: 10px;
    }
    // 收藏区域
    .favi {
      width: 120px;
      font-size: 12px;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      border-left: 1px solid #efefef;
      color: gray;
    }
  }

  // 运费
  .yf {
    margin: 10px 0;
    font-size: 12px;
    color: gray;
  }
}
.goods-nav {
  position: fixed;
  bottom: 0;
  width: 100%;
}
.goods-detail-box {
  padding-bottom: 50px;
}
</style>
